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1.
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14 p, 4.7 MB |
Study of spin-orbit interactions and interlayer ferromagnetic coupling in Co/Pt/Co trilayers in a wide range of heavy-metal thickness
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Ogrodnik, Piotr (AGH University of Science and Technology. Institut of Electronics) ;
Grochot, Krzysztof (AGH University of Science and Technology. Institut of Electronics) ;
Karwacki, Łukasz (Utrecht University. Institute for Theoretical Physics) ;
Kanak, Jarosław (AGH University of Science and Technology. Institut of Electronics) ;
Prokop, Michał (Institut Català de Nanociència i Nanotecnologia) ;
Chȩciński, Jakub (AGH University of Science and Technology. Institut of Electronics) ;
Skowroński, Witold (AGH University of Science and Technology. Institut of Electronics) ;
Ziȩtek, Sławomir (AGH University of Science and Technology. Institut of Electronics) ;
Stobiecki, Tomasz (AGH University of Science and Technology. Institut of Electronics)
The spin-orbit torque, a torque induced by a charge current flowing through the heavy-metal-conducting layer with strong spin-orbit interactions, provides an efficient way to control the magnetization direction in heavy-metal/ferromagnet nanostructures, required for applications in the emergent magnetic technologies like random access memories, high-frequency nano-oscillators, or bioinspired neuromorphic computations. [...]
2021 -  10.1021/acsami.1c11675
ACS applied materials & interfaces, Vol. 13, issue 39 (Oct. 2021) , p. 47019-47032
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2.
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15 p, 1.5 MB |
Room-temperature tunnel magnetoresistance across biomolecular tunnel junctions based on ferritin
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Karuppannan, Senthil kumar (National University of Singapore. Department of Chemistry) ;
Pasula, Rupali Reddy (Nanyang Technological University. School of Chemical and Biomedical Engineering) ;
Herng, Tun Seng (National University of Singapore. Department of Materials Science and Engineering) ;
Ding, Jun (National University of Singapore. Department of Materials Science and Engineering) ;
Chi, Xiao (Singapore Synchrotron Light Source) ;
Del Barco, Enrique (University of Central Florida. Department of Physics) ;
Roche, Stephan (Institut Català de Nanociència i Nanotecnologia) ;
Yu, Xiaojiang (Singapore Synchrotron Light Source) ;
Yakovlev, Nikolai (Institute of Materials Research and Engineering (Singapur, Singapur)) ;
Lim, Sierin (Nanyang Technological University. School of Chemical and Biomedical Engineering) ;
Nijhuis, Christian A. (University of Twente. Department of Molecules and Materials)
We report exceptionally large tunnel magnetoresistance (TMR) for biomolecular tunnel junctions based on ferritins immobilized between Ni and EGaIn electrodes. Ferritin stores iron in the form of ferrihydrite nanoparticles (NPs) and fulfills the following roles: (a) it dictates the tunnel barrier, (b) it magnetically decouples the NPs from the ferromagnetic (FM) electrode, (c) it stabilizes the NPs, and (d) it acts as a spin filter reducing the complexity of the tunnel junctions since only one FM electrode is required. [...]
2021 - 10.1088/2515-7639/abfa79
JPhys materials, Vol. 4, issue 3 (April 2021) , art. 035003
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3.
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31 p, 789.9 KB |
Control of positive and negative magnetoresistance in iron oxide−iron nanocomposite thin films for tunable magnetoelectric nanodevices
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Nichterwitz, Martin (Technische Universität Dresden. Physical Chemistry (Germany)) ;
Honnali, Shashank (Leibniz Institute for Solid State and Materials Research Dresden (Germany)) ;
Zehner, Jonas (Technische Universität Dresden. Institute of Material Science (Germany)) ;
Schneider, Sebastian (Leibniz Institute for Solid State and Materials Research Dresden (Germany)) ;
Pohl, Darius (Dresden Center for Nanoanalysis (DCN)/Center for Advancing Electronics Dresden (Germany)) ;
Schiemenz, Sandra (Leibniz Institute for Solid State and Materials Research Dresden (Germany)) ;
Goennenwein, Sebastian T. B. (Technische Universität Dresden. Institut für Festkörper- und Materialphysik (Germany)) ;
Nielsch, Kornelius (Technische Universität Dresden. Institute of Material Science (Germany)) ;
Leistner, Karin (Technische Universität Dresden. Institute of Material Science (Germany))
The perspective of energy-efficient and tunable functional magnetic nanostructures has triggered research efforts in the fields of voltage control of magnetism and spintronics. We investigate the magnetotransport properties of nanocomposite iron oxide/iron thin films with a nominal iron thickness of 5-50 nm and find a positive magnetoresistance at small thicknesses. [...]
2020 - 10.1021/acsaelm.0c00448
ACS applied electronic materials, Vol. 2, Issue 8 (August 2020) , p. 2543-2549
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4.
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5 p, 1.1 MB |
Tunneling magnetoresistance phenomenon utilizing graphene magnet electrode
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Hashimoto, T. (Aoyama Gakuin University. Faculty of Science and Engineering) ;
Kamikawa, S. (Aoyama Gakuin University. Faculty of Science and Engineering) ;
Soriano, David (Institut Català de Nanociència i Nanotecnologia) ;
Pedersen, Jesper Goor (Institut Català de Nanociència i Nanotecnologia) ;
Roche, Stephan (Institut Català de Nanociència i Nanotecnologia) ;
Haruyama, Junji (Aoyama Gakuin University. Faculty of Science and Engineering)
Using magnetic rare-metals for spintronic devices is facing serious problems for the environmental contamination and the limited material-resource. In contrast, by fabricating ferromagnetic graphene nanopore arrays (FGNPAs) consisting of honeycomb-like array of hexagonal nanopores with hydrogen-terminated zigzag-type atomic structure edges, we reported observation of polarized electron spins spontaneously driven from the pore edge states, resulting in rare-metal-free flat-energy-band ferromagnetism. [...]
2014 - 10.1063/1.4901279
Applied physics letters, Vol. 105, issue 18 (Nov. 2014) , art. 183111
2 documents
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5.
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7 p, 1.4 MB |
Site-Resolved Contributions to the Magnetic-Anisotropy Energy and Complex Spin Structure of Fe/MgO Sandwiches
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Cuadrado, Ramón (Institut Català de Nanociència i Nanotecnologia) ;
Oroszlány, László (Eötvös University. Department of Physics of Complex Systems) ;
Deák, András (Budapest University of Technology and Economics. Department of Theoretical Physics) ;
Ostler, Thomas A. (Université de Liège. Department of Physics) ;
Meo, Andrea (University of York. Department of Physics) ;
Chepulskii, Roman V. (Samsung Electronics) ;
Apalkov, Dmytro (Samsung Electronics) ;
Evans, Richard F. L. (University of York. Department of Physics) ;
Szunyogh, László (Budapest University of Technology and Economics) ;
Chantrell, Roy W. (University of York. Department of Physics)
Fe/MgO-based magnetic tunnel junctions are among the most promising candidates for spintronic devices due to their high thermal stability and high tunneling magnetoresistance. Despite its apparent simplicity, the nature of the interactions between the Fe and MgO layers leads to complex finite-size effects and temperature-dependent magnetic properties which must be carefully controlled for practical applications. [...]
2018 - 10.1103/PhysRevApplied.9.054048
Physical review applied, Vol. 9, Issue 5 (May 2018) , art. 54048
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6.
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25 p, 1.6 MB |
Lateral Magnetically Modulated Multilayers by Combining Ion Implantation and Lithography
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Menéndez Dalmau, Enric (Katholieke Universiteit te Leuven (1970- )) ;
Modarresi, Hiwa (Katholieke Universiteit te Leuven (1970- )) ;
Petermann, Claire (Katholieke Universiteit te Leuven (1970- )) ;
Nogués, Josep (Institut Català de Nanociència i Nanotecnologia) ;
Domingo Marimon, Neus (Institut Català de Nanociència i Nanotecnologia) ;
Liu, Haoliang (Katholieke Universiteit te Leuven (1970- )) ;
Kirby, Brian (Brian J.) (NNational Institute of Standards and Technology (Gaithersburg, Estats Units d'Amèrica)) ;
Mohd, Amir Syed (Jülich Centre for Neutron Science (Jülich, Alemanya)) ;
Salhi, Zahir (Jülich Centre for Neutron Science (Jülich, Alemanya)) ;
Babcock, Earl (Jülich Centre for Neutron Science (Jülich, Alemanya)) ;
Mattauch, Stephan (Jülich Centre for Neutron Science (Jülich, Alemanya)) ;
Van Haesendonck, Chris (Katholieke Universiteit te Leuven (1970- )) ;
Vantomme, André (Katholieke Universiteit te Leuven (1970- )) ;
Temst, Kristiaan (Katholieke Universiteit te Leuven (1970- ))
The combination of lithography and ion implantation is demonstrated to be a suitable method to prepare lateral multilayers. A laterally, compositionally, and magnetically modulated microscale pattern consisting of alternating Co (1. [...]
2017 - 10.1002/smll.201603465
Small, Vol. 13 Núm. 11 (March 2017) , article 1603465
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7.
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4 p, 491.6 KB |
Magnetization reversal in long chains of submicrometric Co dots
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Martín, J. I. (University of California, San Diego. Department of Physics) ;
Nogués, Josep (University of California-San Diego. Physics Department) ;
Schuller, Ivan K. (University of California, San Diego. Department of Physics) ;
Van Bael, M. J. (Katholieke Universiteit Leuven. Laboratorium voor Vaste-Stoffysica en Magnetisme) ;
Temst, Kristiaan (Katholieke Universiteit Leuven. Laboratorium voor Vaste-Stoffysica en Magnetisme) ;
Van Haesendonck, C. (Katholieke Universiteit Leuven. Laboratorium voor Vaste-Stoffysica en Magnetisme) ;
Moshchalkov, V. V. (Katholieke Universiteit Leuven. Laboratorium voor Vaste-Stoffysica en Magnetisme) ;
Bruynseraede, Y. (Katholieke Universiteit Leuven. Laboratorium voor Vaste-Stoffysica en Magnetisme) ;
American Physical Society
Long chains of 400 nm diam Co dots prepared by combined electron-beam lithography exhibit interesting magnetotransport properties. The magnetoresistance of the chains of dots is markedly different from single Co films, indicating a strongly modified magnetization reversal process. [...]
1998 - 10.1063/1.120702
Applied physics letters, Vol. 72, Issue 2 (January 1998) , p. 255-257
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